The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 1999
Filed:
Sep. 18, 1996
Pentti Raura, Valko, FI;
Sunds Defibrator Loviisa Oy, Valko, FI;
Abstract
Procedure for separating heavy particles of material from lighter particles, e.g. for separating impurities from powdery or fragmental material, such as fibers or chips, in which procedure the material (2) to be treated is supplied onto a carrier surface (1) pervious to gas and gas impacts (P) are applied to the material through the carrier surface (1), causing the heavier particles to move closer to the carrier surface (1). The carrier surface (1) is mainly moved in one direction of movement to move the heavy particles (R) and the lighter particles (K) are passed, mainly by the agency of the inclination of the carrier surface (1) and/or the gas flow, in a direction substantially differing from the principal direction of movement of the carrier surface (1). The invention also relates to an apparatus implementing the procedure.